Siemens SIRIUS 3RT2028-1AD20-0JA0 Power Contactor, 3-Pole, 38A, 18.5kW, 42V AC Coil, Size S0 Original Brand New

Overview

The Siemens 3RT2028-1AD20-0JA0 is a high-performance 3-pole power contactor from the trusted SIRIUS 3RT2 series, designed for reliable switching of motors and other industrial loads up to 18.5 kW at 400 V (AC-3). Featuring a compact Size S0 design and easy-to-use screw terminals, this contactor is a standard component in industrial control systems and motor starter applications.

It is equipped with a specific 42 V AC, 50/60 Hz operating coil and includes integrated 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts, providing immediate status feedback and control flexibility. The robust design, with a rated current of 38 A (AC-3e/AC-3), ensures reliable operation even in demanding environments, with an operational temperature limit of Tu​ max. 50∘C.

Key Specification

• Product Number: 3RT2028-1AD20-0JA0
• Product Series: SIRIUS 3RT2
• Contactor Size: S0
• Poles: 3-pole
• Rated Operating Current (Ie​): 38 A (for AC-3e/AC-3 at 400 V)
• Motor Power Rating: 18.5 kW at 400 V
• Control Supply Voltage: 42 V AC, 50/60 Hz
• Auxiliary Contacts: 1 NO + 1 NC (Integrated)
• Connection Type: Screw Terminals
• Rated Insulation Voltage (Ui​): 690 V
• Mechanical Service Life (typical): 10 million operating cycles
• Applicable Standard: IEC/EN 60947

Application

The Siemens 3RT2028-1AD20-0JA0 Contactor is perfectly suited for use in:

• Controlling and switching electric motors (e.g., pumps, fans, conveyors)
• Creating combination motor starters (in conjunction with an overload relay)
• Switching resistive loads (heating)
• Automation and machine control panels
• Industrial plants and infrastructure

For a complete range of industrial control components and more Siemens SIRIUS products, visit turll today!